Quantity   Component name
1 × You do not need all these things You could leave almost everything on this list out to save cost and to make things easier, but what's the fun if there are no problems?
5 × Arduino Nano Nodes
1 × Arduino Uno As it is a Nano, only bigger, it's nice to prototype nodes before soldering a bunch of wrong wires.
1 × Arduino Mega Central hub
8 × NRF24L01+ Radios
3 × PIR sensors Movement monitoring
1 × RTC module To keep time
1 × 16x2 LCD I2C Any LCD would do, sometimes one needs a bit more than leds.
1 × Membrane keypad 4x4
1 × Ampere metre with custom dial To add some awesome analogue dial goodness
1 × RS232 Elotouch touchscreen Something I just don't wish to throw away
1 × Old Sony Ericsson phone To dial, send SMSs and annoy me when it needs a recharge
1 × HC-06 Bluetooth For the master to make my phone beep
1 × Ethernet module Just to try to use something more
1 × DHT11/22 To know the temperature and humidity.